<template>
  <view v-if="goodsDetail.goods_name">
    <!-- #4 商品图片轮播图 -->
    <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000">
      <swiper-item v-for="(item, i) in goodsDetail.pics" :key="i">
        <image :src="item.pics_big" @click="prevImage(i)"></image>
      </swiper-item>
    </swiper>


    <!-- 商品信息 -->
    <!-- 商品信息区域 -->
    <view class="goods-info-box">
      <!-- 商品价格 -->
      <view class="price">￥{{goodsDetail.goods_price}}</view>
      <!-- 信息主体区域 -->
      <view class="goods-info-body">
        <!-- 商品名称 -->
        <view class="goods-name">{{goodsDetail.goods_name}}</view>
        <!-- 收藏 -->
        <view class="favi">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yf">快递：免运费 {{cart.length}}</view>
    </view>

    <!-- 商品详细介绍 -->
    <rich-text :nodes="goodsDetail.goods_introduce"></rich-text>

    <!-- 商品导航 -->
    <!-- fill true 表示圆角 -->
    <!-- options 表示左边的配置项 -->
    <!-- buttonGroup 表示右边的配置项 -->
    <!-- @click 点击左边配置项的时候触发 -->
    <!-- @buttonClick 点击右边配置项的时候触发 -->
    <button open-type="contact" class="kf"></button>
    <view class="goods-nav">
      <uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup" @click="onClick"
        @buttonClick="buttonClick" />
    </view>
  </view>
  <view v-else>
    loading...
  </view>
</template>

<script>
  import {
    mapState,
    mapMutations,
    mapGetters
  } from 'vuex'
  export default {
    data() {
      return {
        goodsDetail: {},
        options: [{
          icon: 'headphones',
          text: '客服'
        }, {
          icon: 'cart',
          text: '购物车',
          info: 0
        }],
        buttonGroup: [{
            text: '加入购物车',
            backgroundColor: '#ff0000',
            color: '#fff'
          },
          {
            text: '立即购买',
            backgroundColor: '#ffa200',
            color: '#fff'
          }
        ]
      };
    },
    computed: {
      // 模块名、state 中的数据
      ...mapState('m_cart', ['cart']),
      ...mapGetters('m_cart', ['total'])
    },
    watch: {
      /* total(newTotal) {
        this.options[1].info = newTotal
      } */
      total: {
        handler(newTotal) {
          this.options[1].info = newTotal
        },
        immediate: true
      }
    },
    onLoad({
      goods_id
    }) {
      this.getGoodsDetail(goods_id)
    },
    methods: {
      ...mapMutations('m_cart', ['addToCart']),
      async getGoodsDetail(goods_id) {
        const {
          data: res
        } = await uni.$http.get('/goods/detail', {
          goods_id
        })
        if (res.meta.status !== 200) return uni.$showMsg()
        res.message.goods_introduce = res.message.goods_introduce.replace(/\<img /g, '<img style="display:block" ')
          .replace(/\.webp/g, '.jpg')
        this.goodsDetail = res.message
      },
      prevImage(i) {
        // 在某个事件中触发图片预览
        const urls = this.goodsDetail.pics.map(item => item.pics_big)
        /* wx.previewImage({
          // urls: ['https://example.com/image.jpg'],
          urls,
          current: urls[i] // 从哪一张图片开始预览
        }); */
        // console.log(urls)
        uni.previewImage({
          urls,
          current: i // 从哪一张图片开始预览
        });
      },
      onClick(e) {
        if (e.index === 1) {
          uni.switchTab({
            url: '/pages/cart/cart'
          })
        }
      },
      buttonClick(e) {
        if (e.content.text === '加入购物车') {
          const goods = {
            goods_id: this.goodsDetail.goods_id, // 商品的Id
            goods_name: this.goodsDetail.goods_name, // 商品的名称
            goods_price: this.goodsDetail.goods_price, // 商品的价格
            goods_count: 1, // 商品的数量
            goods_small_logo: this.goodsDetail.goods_small_logo, // 商品的图片
            goods_state: true // 商品的勾选状态
          }
          this.addToCart(goods)
        }
      }
    }
  }
</script>

<style lang="scss">
  swiper {
    height: 750rpx;

    image {
      width: 100%;
      height: 100%;
    }
  }

  // 商品信息区域的样式
  .goods-info-box {
    padding: 10px;
    padding-right: 0;

    .price {
      color: #c00000;
      font-size: 18px;
      margin: 10px 0;
    }

    .goods-info-body {
      display: flex;
      justify-content: space-between;

      .goods-name {
        font-size: 13px;
        padding-right: 10px;
      }

      // 收藏区域
      .favi {
        width: 120px;
        font-size: 12px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        border-left: 1px solid #efefef;
        color: gray;
      }
    }

    // 运费
    .yf {
      margin: 10px 0;
      font-size: 12px;
      color: gray;
    }
  }

  .goods-nav {
    position: sticky;
    bottom: 0;
    z-index: 99;
  }

  .kf {
    position: fixed;
    width: 50px;
    height: 50px;
    bottom: 0;
    left: 0;
    z-index: 999;
    background-color: transparent;
  }
</style>
